PALO ALTO, CA - November 5, 2008 - Socialtext, the Enterprise Social Software leader, today announced it will host Widget Wednesday on November 12, a distributed hackathon for widgets and mashups. Socialtext partners Box.net, Denodo, Newsgator, Meebo, Six Apart, Slideshare and others will participate in the hackathon to develop OpenSocial standard-based widgets and mashups on the Socialtext platform. Socialtext also announced that it will release all of the widgets it develops under an Open Source license -- to help partners, customers and developer community members create mashups leveraging Socialtext's best-in-class REST API.
OpenSocial is the standard propogated by Google for creating widgets: There is an OpenSocial Foundation, and they are celebrating a 1st anniversary in (where else) San Francisco on November 13. A highlight of the event is the Global Container Crawl where you test your install on as many systems as you can do in one afternoon.
There are hundreds of millions of people using social networking sites that support OpenSocial apps. To take advantage of the distribution that OpenSocial provides, you'll want your app to run on more than just one site. There are a few things to consider when writing or maintaining an app that works across containers. This page will give you an overview of these issues, and you can find tips for reaching users on specific containers by following the links in the Containers section.
The OpenSocial community wiki has way more details.